TAKING A STAND: Beyoncé and Jay-Z join Trayvon Martin’s mom, Sybrina Fulton, and the Rev. Al Sharpton here yesterday at a rally calling for a federal probe of the slaying. Photo: Twitter

Beyoncé and Jay-Z stood beside Trayvon Martin’s mother in lower Manhattan yesterday during one of more than 100 nationwide demonstrations demanding justice for the slain teen.

The music moguls were among the 1,000-plus protesters in front of One Police Plaza calling for a federal civil-rights probe of George Zimmerman, who was found not guilty of murder charges this month.

“Trayvon is not here to speak for himself,” heartbroken mom Sybrina Fulton told the crowd. “Trayvon was a child, and sometimes I think that gets lost in the system.”

At a rally earlier in the day at the Rev. Al Sharpton’s National Action Network in Harlem, Fulton spoke specifically about the February 2012 night her son was shot dead while walking through the gated Florida community where his dad lived.

“Trayvon was no burglar,” Fulton said. “George Zimmerman started the fight, and George Zimmerman ended the fight.

“My son died without knowing who killed him. He died without knowing who his murderer was.”

Many of the protesters at One Police Plaza wore hoodies — which Trayvon was wearing the night he was shot. “We love you,” the crowd yelled to Fulton.

Fulton and her ex-husband, Tracy Martin — who spoke at a similar rally in Miami — vowed to fight for children and the victims of senseless gun violence.

The case has sparked national outrage over racial profiling and drew an emotional response Friday from President Obama, who said, “Travvon Martin could have been me 35 years ago.”

At the rally downtown, Beyoncé and Jay-Z remained at Fulton’s side, but didn’t speak. “No concerts in Florida!” protesters shouted at Beyoncé.

“Trayvon cannot rest in peace if we are not peaceful,” Fulton’s attorney, Benjamin Crump, told the crowd. “Are we going to let any neighborhood watchdog with a 9mm gun follow our children?”

Flags from different nations fluttered in the crowd. “We have to unite. Blacks, whites, Latinos, Asians, we all have to come together and say, ‘We need common-sense laws,’ ” he said.

Parents, like Maria Lopez, 31, of Harlem brought their children to the rally. Lopez tattooed “Skittles” at the top of her chest.

She got the word inked on herself two days after Martin was slain. Trayvon was carrying the candy when he was killed.

“It touched me a lot. I have four beautiful daughters that I worry about I don’t want them to be scared in the street, she said.

Steven Shryack, 62, held a sign: “They never stop-and-frisk old white guys like me.”

At the rally in Washington, DC, activist Dick Gregory called on people to hurt Florida by boycotting Disney — and orange juice. “They got oranges that they can’t afford to have you not buy because they will rot,” he said.

Meanwhile, a new Rasmussen poll said that 32 percent of Americans view Zimmerman favorably. Zimmerman’s disapproval rate is 48 percent.